Morphologies of carbon micro-coils grown by chemical vapor deposition

摘要

The carbon micro-coils were obtained by the Ni-catalyzed pyrolysis of acetylene. The carbon micro-coils withvarious coiling morphology: regular double coils, coils built up bycircular or flat fibers, super helix coils, single coils, etc. can beobserved. The carbon coils with various coil diemeters and coilpitches were obtained by controlling veaction conditions, such asreaction temperature, source gas flow rate of sulfur-impurity,acetylene or hydrogen.